Project description:Murine lung gene expression responses to primary and secondary infection with Bordetella pertussis. Data were compared to other parameters such as flow cytometry and multiplex immunoassays.
Project description:Genome-wide expression analysis of mouse lung responses to Bordetella pertussis infection and the effects of pertussis toxin Total lung RNA from wild-type and pertussis toxin-defficient B. pertussis-infected mice at two and four days post inoculation compared to control, mock-infected mice. Seven-week old female BALB/c mice were intranasally inoculated with 1 x 106 CFU WT B. pertussis (Tohama I), 1 x 106 CFU ΔPT (WT carrying a PT deletion), or 30 x 106 CFU of the ΔPT strain. Whole lung tissue was collected from mice sacrificed at 2 and 4 days post inoculation (n = 3 per group per time point). Control mice were inoculated with PBS and sacrificed 2 days post inoculation (n = 2).
Project description:Murine gene expression responses to Bordetella pertussis were determined in lung and spleen, between 0 and 28 days post infection. Data were compared to other parameters such as microarray, flow cytometry, multiplex immunoassays, and lung clearance.
Project description:Copper is both essential and toxic to living beings, which therefore tightly control its intracellular concentration. At the host-pathogen interface, copper is used by phagocytic cells to kill invading microorganisms. We investigated copper homeostasis in the whooping cough agent Bordetella pertussis, which lives in the human respiratory mucosa and has no environmental reservoir. B. pertussis has considerably streamlined copper homeostasis mechanisms relative to other Gram-negative bacteria. Its single remaining defense line against copper intoxication consists in a metallochaperone diverted for copper passivation and two enzymes involved in peroxide detoxification, which together fight two stresses encountered in phagolysosomes. The three proteins are encoded by an original, composite operon assembled in an environmental ancestor and which is under sensitive control by copper. Interestingly, this system appears to play a role in persistent infection in the nasal cavity of B. pertussis-infected mice. Combining responses to co-occurring stresses in a tailored operon reveals a new strategy adopted by a host-restricted pathogen to optimize survival at minimal energy expenditure.
Project description:Murine gene expression responses to Bordetella pertussis were determined in lung and spleen, between 0 and 28 days post infection. Data were compared to other parameters such as microarray, flow cytometry, multiplex immunoassays, and lung clearance. A 57 array study with 27 arrays for lung and 30 for spleen. For each tissue we used a common reference made from RNA samples of the same tissue. Please note that the reference samples are made by pooling RNA of all samples used for a tissue (either infected or uninfected). Thus, Lung and spleen each have their own reference.
Project description:We infected adult (6-8 weeks) and old (62-72 weeks) mice with RSV or mock control and determined transcriptional responses in their lungs.